1. Yield point (s)
Thaum cov hlau los yog cov qauv yog ncab, thaum qhov kev ntxhov siab tshaj qhov kev txwv elastic, txawm tias qhov kev ntxhov siab tsis nce ntxiv, cov hlau los yog cov qauv txuas ntxiv mus rau qhov pom tseeb ntawm cov yas deformation. Qhov tshwm sim no hu ua yield, thiab qhov tsawg kawg nkaus tus nqi kev ntxhov siab thaum qhov tshwm sim tshwm sim yog qhov taw tes tawm. Yog tias Ps yog lub zog sab nraud ntawm qhov taw tes tawm s thiab Fo yog thaj tsam ntawm cov qauv, ces qhov taw tes tawm σ s =Ps/Fo(MPa).
2. Yield zog (σ 0.2)
Qhov taw tes tawm los ntawm qee cov ntaub ntawv hlau yog qhov tsis pom tseeb, uas nyuaj rau ntsuas. Yog li ntawd, txhawm rau ntsuas cov yam ntxwv ntawm cov khoom siv, nws tau teev tseg tias qhov kev ntxhov siab thaum cov yas deformation ruaj khov yog sib npaug rau qee yam nqi (feem ntau {{0}}}.2 feem pua ntawm qhov qub ntev) yog generated, uas yog hu ua conditional yield zog los yog yield zog rau luv luv σ 0.2.
3. Tensile zog (σb)
Qhov siab tshaj plaws tus nqi tau ncav cuag los ntawm cov khoom siv thaum lub sij hawm tensile txheej txheem txij thaum pib mus rau lub sij hawm ntawm tawg. Nws qhia txog kev tiv thaiv ntawm cov hlau kom tawg. Lub zog compressive thiab khoov lub zog yog sib haum rau lub zog tensile. Yog tias Pb yog qhov siab tshaj plaws tensile quab yuam mus txog ua ntej cov khoom tawg, thiab Fo yog qhov chaw hla ntawm cov qauv, ces lub zog tensile σ b= Pb / Fo (MPa).
4. Elongation (δ s)
Qhov feem pua ntawm qhov ntev ntawm cov yas elongation thiab qhov ntev ntawm cov qauv qub tom qab cov khoom tawg yog hu ua elongation lossis elongation.
5. Yield ratio (σ s / σ b)
Qhov piv ntawm qhov taw tes tawm (yield zog) rau lub zog tensile ntawm steel yog hu ua yield zog piv. Qhov ntau dua qhov sib piv, qhov kev ntseeg siab ntawm cov khoom siv ntau dua. Qhov sib piv ntawm cov pa roj carbon steel dav dav yog {{0}}}6-0.65, thiab cov hlau tsis tshua muaj hlau yog 0.65-0.75, thiab qhov ntawd ntawm alloy structural steel yog 0.84-0 86.
6. Hardness
Hardness yog hais txog lub peev xwm ntawm cov khoom siv los tiv thaiv cov khoom tawv uas nias rau hauv nws qhov chaw. Nws yog ib qho tseem ceeb ntawm kev ua tau zoo ntawm cov khoom siv hlau. Feem ntau, qhov siab dua qhov hardness, qhov zoo dua qhov hnav tsis kam. Feem ntau siv hardness ntsuas yog Brinell hardness, Rockwell hardness thiab Vickers hardness.
